Isaac p



l. P CADMAN'.

Harvester Rake.

Patented Dec. 17; 1867.

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ISAAC l. GA'DMAN, OF MENDOTA, ILLINOIS, ASSIGNOR TO HIMSELF AND JAMES AIKEN, OF SAME PLACE.

Letters Patent No. 72,163, dated December 17, 1867.

IMPROVEMENT IN HARVESTER-RAKES.

TO ALI, WHOM IT MAY CONCERN:

Be it known that I, ISAAC P. CADMANQof Mendota, in the county of La Salle, and State of Illinois, have invented certain new and useful Improvements in Self-Acting Rakes for Harvesting-Machines; and I do hereby declare the following to be a full, clear, and exact description of the same, reference being had to the accompanying drawings, making a part of this specification, in which-3 1 Figure 1 represents in perspective my rake, applied to so mhch ofa harvesting-machine as willfully illustrate its'position and operation.

Figure 2 represents a top plan of the same. V

Similar lettersbf reference, where they occur in the separate figures, denote like parts of themachine and raking-apparatus in both of the drawings.

My invention consists, first, in so combining the rake with the cam-wheel which gives it its rising and falling motion as that the rakeshall move with the cam-wheel in clearing the platform or grain-table, and independent of it when it returns for the next clearing or raking operation; and it further consists in a holdingarm, working in conjunction with the rake.

To enable others skilled in the art to make and use my invention, I will proceed to describe the same with reference to the drawings. i

p A represents the main frame of a harvesting-machine, supported on the axle B of the carrying and driving wheel C. D is the finger-bar; E, the platform or grain-table; F, the outside divider; and G, the fence or marginal board of the platorm, to prevent the grain from leaving the platform, as it is moved around by the rake, until it arrives at the delivery-edgeor side H thereof. I I are small supporting-wheels, for carrying the rear portion of the machine, and keeping it oil the ground. Upon the axle or shaft B there is placed a sleeve, a, which can be adjusted thereon, and, when adjusted, is held rigidly thereto (and turns with said axle or shaft) by a set-screw, b. Upon this sleeve a is placed loosely a wheel or hub, e, having a series of bevel-cog's, 1 2, of different diameters, formed thereon; and between this wheel 'or hub c and the collar d, on the end of the sleeve a, there is a clutch, e, which is held in action by the spring f, to compel the hub or wheel 0 to turn with the sleeve a, and with the axle or shaft 13, but which can be thrown out of action at pleasure by the clutch-lever g- A crown-wheel, 7a, is arranged upon a vertical shaft, 2', which wheel and shaft may be adjusted vertically by means of the set-screw m, so that when the sleeve a or wheel a is moved along'on the shaft 13, to bring any special one of the series of cogs upon it into working'positiop with the crown-wheel 71, the latter may be raised or lowered, as the case may be, to work in gear with that special one of the series. On the crown-wheel I: there is a wrist-pin, 71, to which one end of the connecting-rod j is fastened, the other end of-said io'd being attached, by a link or loop, is, to the rake-head Z, near its heel, where it is pivoted to the postc. A cam-wheel, J, having four cam planes upon it, is arranged to move around the post or pivot 0 as a centre, and upon the under side of the rake-head Z, and at its rear, there is a downward projcctiomp, that rides upon or ov'r one of the cam-planes in returning, to clear the platform a second time, and which takes against another portion of said plane, to move the wheel J, with itself, whilst clearing the platform. A spring, g, at the end of tlic rake-head, is compressed, by the rake-head pressing against it, as it rides up one of the planes upon the wheel J, and when it passes over the highest point of said cam-plane, the recoil of the spring forces down the rake on to the platform. Upon the projection 12 there is a hooked arm, 1-, which, when or a little after therake falls, takes under a flange, s, on the cum-wheel J, and prevents the rake from rising. A spring-dog, t, takes into notches or behind ratchetshouldcrs u, to hold the wheel J still whilst the rake'is coming back for the next raking operation.

It will be readily perceived how therake gets its circular reciprocating motion from the crank'or muWIb wheel it. Its rising and falling motion I will explain. When the rake has completed its sweep, having moved the cam-wheel with it a quarter revolution, the spring it drops behind one of the shoulders at. The rake then begins to move forward for another operatiom but the wheel is held from moving with it by the spring 23. As the rake moves forward, its projection, 19, mounts the cam-plane, and of course the rake-rises accordingly, and high enough to prevent it from interfering with the falling grain. When the projectionp passes'the apex of the plane, the spring q forces down the rake on to the platform, and the projection then takingtagninst a side of the cam-plane, and its hook catching under the'ilange s, it cannot ride up or rise, and sweeps off the platform, carrying the wheel J around with itself until the gavel is delivered, and the spring-dog catches and holds the wheel, and the rake returns for another succeeding similar operation. 7

It is obvious that this rake and mechanism can be applied to a two-wheeled machine, or to a flexibleor yielding-bar machine, as the rod j is like a link motion, and yielding; and the series of rows of bevel-gears, instead of being on the wheel a, may be concentrically arranged on the under side of the crown-wheel h, and answer the same purpose.

A stud, 3, is arranged on the rake-head], on which is pivoted a holding-arm, 4, said arm being somewhat longer than the rake-head, so that its extremeouter point may drop and rest upon a projection, 5, on the outer shoe or divider F, A bentarm, 6, on the connecting-rod 3', moves the holding-arm, starting it after the rake has moved some distance. A. projection, 7, on the rake-head, catches and brings back the arm 4 as it returns. The object of the arm 4 is to hold the falling grain until the rake passes from under it, and thus to prevent the falling grain from bcingentangled with that being raked ofi'.

Having thus fully described my invention, what I claim therein as new, and desire to secure by Letters Patent, is-- v I So combining a circular reciprocating rake with the cam-wheelwhich gives it its rising and falling motion as that the rake shall move said wheel wheu it"clears the platform, and without it when it returns for the next sweeping or clearing operation, substantially as described. I

I also claim, in combination'with the sweep-rake, the pivoted holding-arm 4, acting in conjunction with it-,@

as and for the purpose described.

' ISAAC CADMAN.

Witnesses:

CALEB WALKER, J. O. Onooxnn. 

